Ido Yariv 550acb1926 genirq: Fix race condition when stopping the irq thread ... In irq_wait_for_interrupt(), the should_stop member is verified before setting the task's state to TASK_INTERRUPTIBLE and calling schedule(). In case kthread_stop sets should_stop and wakes up the process after should_stop is checked by the irq thread but before the task's state is changed, the irq thread might never exit: kthread_stop irq_wait_for_interrupt ------------ ---------------------- ... ... while (!kthread_should_stop()) { kthread->should_stop = 1; wake_up_process(k); wait_for_completion(&kthread->exited); ... set_current_state(TASK_INTERRUPTIBLE); ... schedule(); } Fix this by checking if the thread should stop after modifying the task's state. [ tglx: Simplified it a bit ] Signed-off-by: Ido Yariv <ido@wizery.com> Link: http://lkml.kernel.org/r/1322740508-22640-1-git-send-email-ido@wizery.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: stable@kernel.org		2011-12-02 11:54:24 +01:00
..
autoprobe.c
chip.c
debug.h
devres.c
dummychip.c
generic-chip.c
handle.c
internals.h
irqdesc.c
irqdomain.c
Kconfig
Makefile
manage.c	genirq: Fix race condition when stopping the irq thread	2011-12-02 11:54:24 +01:00
migration.c
pm.c
proc.c
resend.c
settings.h
spurious.c	genirq: fix regression in irqfixup, irqpoll	2011-11-28 08:43:09 -08:00